Wiper-ring for the cylinders of internal-combustion engines



1. E. rmzesom.v WIPER RING FOR THE CYLINDERS OF INTERNAL COMBUSTIONENGINES.

APPLICATION FILED LAN- 3. I920- Patented Feb. 15, 1921.

JOIN is. mn'cson. or GATSKILL, NEW YORK.

wIrEa-Rmo FOR THE CYLINDERS or m'rnn'nar-comnnsrron "enemas.

Specification of Letters Patent.

Patented Feb. 15, 1921.

. Application filed January 3, 1920. Serial No. 349,157. 1

To all whom it may concern:

Be it known that I, JOHN E. MEosoN, a citizen of the United Statesresidin at Catskill, county of Greene, tate of ew York, have invented acertain new and useful Improvement in Wiper-Rings for the Cylinders ofInternal-Combustion Engines,

of which the following is a specification,

reference being had to the accompanying drawing, forming a part thereof.

This invention relates generally to internal combustion engines and,more particularly, to a certain new and useful improvement inwiper-rings, so-called, for the cylinders thereof.

In internal combustion engines of the splash system of lubrication typeespecially, lubricant from the crank-case will, unless prevented, work uthe cylinder wall and find its way into t e on ine combustion orexplosion chamber, the e ciency and proper operation of the engine beingthereby detrimentally afi'ected.

The chief object of my present invention is to obtain the efiiciency andproper operation of the engine bein so aifected, and with this and otherob ects in View, my present invention resides in the provision 'upon thepiston, of a socalled wiper orauxiliary ring so constructed andcooperating with the piston and cylinder-wall as to .form what might bedesignated or described as a seal between the piston and cylinderwallagainst the lubricant working up the cylinder-wall into thecombustion-chamber, t e ring carrying up with it on the upstroke of thepiston only suflicient lubricant to properly lubricate the rubbing facesor suraces of the piston and cylinder, and the ring on the down-strokeof the piston wiping and removing from the cylinder-wall and leading ordirecting back into the crankcase any surplus or excess lubricant,.andin the novel features of form, construction, arrangement, andcombination, of parts hereinafter described and. afterward pointed outin the claims.

In the accompanying drawing,

Figure 1 is an elevational view of an engine-piston and wiper-ringconstructed in accordance with and embodying my invention, the samebeing illustrated in operative connection with the cylinder shown inlongitudinal section;

Fig. 2 is an inverted plan view of the ring, the piston being indicatedby dotted lines;

Fig. 3 is a cross-sectional view of the pistorci1 on approximately theline 3-3, Fig. 1; an

Fig. 4' is an enlarged transverse section of the mug, operatively shownin connection with an enlarged fragmental section of the piston.

Referring now more in detail to the said drawing, in which likereference characters indicate like parts throughout the several views, 1indicates a cylinder of an internal combustion engine of any standard orapproved splash system of lubrication type. Arranged for reciprocationin cylinder 1, is a piston 2 provided near its upper orcombustion-chamber end with suitable packingrings 4, asis usual.

Suitably adjacent its lower or crank-case end, as seen inFig. 1, thepiston 2 is provided circumferentially with a peripheral annular grove5. This groove 5 is preferably rectangular in section, as seen in Fig.4, to accommodate the ring 8 hereinafter more fully described; but itwill be seen that a portion of the lower wall of the groove is cut awayto provide the iston circumferentially with'a beveled wa l 6 whichinclines or slopes inwardly toward the groove 5, the piston2 beingthereby circumferentially formed, for purposes shortly appearing,immediately next and in communication with the groove 5, with an annularoil or lubricant receiving or collecting basin. Formed in or upon thesurface of the piston, is a plurality or series of spaced longitudinalgrooves or lubricant-ways 7, which communicate at their upper ends withthe basin 6 and lead or drain from the basin 6 to the lower or crank-endof the piston.

Fitting in the groove 5, as seen in Figs.

1 and 4, is my new wiper-ring 8, which is.

also for the most part rectangular in transverse section, and which ispreferably of eccentric split construction, as seen in Fig. 2, the ringbeing radially expansive and its ends overlapping, as shown. The ring 8is further of such relative size to neatly and conveniently fit withinthe roove 5 and expansively bear and rub at t e lower part of its outeror front face a ainstthe cylinder-wall. The upper part 0 the front orouter face of the ring 8 is, however,

beveled off or cut away inwardly at an'anle, as at 11, for purposesshortly appearmg, the wall 11 merging at its opposite ends in gentlyrounded corners into the upper face and the lower part of the outer faceof the ring, as seen particularly in Fig. 4.

Formed in the outer part of the lower or under face of the ring 8, is anannular groove 9 preferably of inverted V-shape in section, the outerwall of the groove 9 intersecting the periphery of the ring and formingtherewith at the lower outer'edge of the ring an annular scrapingknife-edge 10 facing the crank-case and over-hanging zfi zing clearancebetween the upper part of the r face, carry up onlyv su outer face ofthe ring and the cylinderwall, whereby, as will now be evident, on

the up-stroke of the piston the ring 8 will,

through or by its be'arin or rubbing outer fli cient lubricant toprovide for proper lubrication between the rubbing faces of the pistonand cylinderwall.

On the down-stroke of the piston, any surplus or excess lubricant on thecylinder-wall will be wiped or scraped therefrom by the knife-edge 10and be-received or collected in the groove 9, and in due course find itsway or drain froni the groove 9 to the basin 6 and through the ways 7back into the crank-case. By having the inner wall of the groove. 9coinciding with the beveled wall of the basin 6, the lubricant has afree passage from the groove, and thus there is no possibility .of too'much lubricant being pocketed by projecting parts of the piston.

Thus, as described, by my new wiper-ring and piston-construction, thelubricant from the crank-case is most effectively sealed from thecombustion-chamber, and I have found from experience that by the use ofmy new wiper-ring and piston-construction, there is effected a largesavin in lubricant, carbon in the cylinders and fowling of thesparkplugs greatly obviated, the efficiency of the engine maintained,and the mileage obtained considerably increased.

I am aware that changes in the form, construction, arrangement, andcombmation of the several parts of my Wiper-ring and:

piston-construction may be made and subs. I stituted for those hereinshown and. de-

scribed without departing from the nature in the cylinder, the pistonbeing provided adjacent its crank-case end with a circumferentialring-receiving groove, the lower wall of the groove being partlycut-away to form a circumferential lubricant-receiving basin immediatelynext said groove,

. and an expansive ring fitting in said roove andhaving a bearingagainst the c inder- Wall, the ring being provided on i s under face andnext its periphery with an inverted V-shaped' annular groove, the outerwall of the groove formin with the periphery of the ring an annu arscraping-knife-edge, said edge over-hanging said basin and saidring-groove communicating directl with said basin, the piston beingprovide longi: tudinally with a series of spaced surface grooves leadingfrom said basin to the crank-case end of the piston.

2. The combination with the cylinder of an engine, of a piston adaptedto reciprocate in said cylinder and provided adjacent to its crank-caseend with a circumferential ring-receiving groove, the lower wall. of

said groove partlycut away to form a circumferential lubricant-receivingbasin next to said groove, and'an expansive ring fitting in said grooveand adapted to bear against thecylinder wall, the ring being provided onits under face and next its outer periphery with aninverted V-shape dannular groove, the outer wall of said groove forming with the peripheryof the ring an annular scra-p- In witness whereof I have signed my. nameto this specification.

JOHN E; MEGsoN;

